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US 4,053,570 AGranted
Aluminum halohydrate
OwnerGeorge G. Merklinventor
Life of this patent
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Abstract
An aluminum halohydrate is formed by first preparing a reactive aluminum by permeating highly pure aluminum with mercury in the presence of a hydrogen ion source and then contacting the reactive aluminum with a source of iodine, chlorine, bromine or fluorine in the presence of water. The products obtained show high stability, uniformity from batch to batch, and a pH of about 4.3.
Claims5
A method of preparing a polymeric aluminum halohydrate having a ratio of aluminum to halogen of from 2:1 to 2.7:1 and a stable pH of from about 4.2 to about 4.3 which comprises:
- reacting, in an aqueous medium, a gaseous halogen selected from chlorine, bromine and iodine with mercury permeated aluminum of a purity of at least 99.98% by weight, the mercury content of said mercury permeated aluminum ranging from about 0.1 percent to about 5 percent by weight;
- and collecting the formed aluminum halohydrate.
Dependencies are inferred from the claim text.